The Timken Company 416921 Radial Shaft Oil Seal

Timken National 416921 is a radial shaft oil seal designed to retain lubricants and prevent contaminants from entering rotating equipment. It features a Type 41, multi-lip spring-loaded design that minimizes lubricant leakage, extends bearing life, and reduces maintenance requirements in general-purpose industrial sealing applications. The nitrile (NBR) sealing element sits in a steel case with an inner case and is finished with Redi-Coat for durability in normal industrial conditions, making it suitable for gearboxes, pumps, conveyors, compressors, electric motors, and other power-transmission systems. Key dimensions include a shaft diameter of 2.875 in (73.025 mm), outside diameter of 4.008 in (101.803 mm), housing bore of 4.003 in (101.676 mm), and an overall width of 0.375 in (9.525 mm). The seal supports up to 3000 ft/min maximum shaft surface speed and accommodates misalignment of 0.015 in at 800 rpm and 0.010 in at 4200 rpm. The operating temperature range is -40°F to 225°F (-40°C to 107°C). Common replacements include SKF 416921, CR 416921, and National 416921.